Fishing tool



Marbh 17, 1925. I 1 G. A. ROBISON FISHING TOOL Filed Oct. 28, 1924 iratentcn Mar. M, ra a,

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FISHING T001 Application filed october 28, 1924. Serial No. 746,411.

To aZZ whom it may concern:

Be it known that T, GEORGE A. Ronrsolv, a citizen of the United States, residing at Fellows, in the county of Kern and State of California, have invented certain new and useful Tmprovements in Fishing Tools, of which the following is a specification.

This invention appertains to well digging appliances, and more particularly to re fishing tools and is an improvement over my Patent 1,409,197 issued to me March 1%, 1922.

The primary object of the present invention is to provide novel means for mountto ing the arms in the body of the tool, where by loss of the arms during the raising and lowering of the tool in the well is absolutely precluded.

Another prime object of the invention is to provide a simplified means for slidably mounting the arms in the body of the tool for effectively insuring the proper gripping of the article being raised from out of the well.

A further object of the invention is to provide a novel fishing tool in which the jaw portions of the arms can be constructed in a number of different ways according to the nature of the object being raised from so the well.

A still further object of the invention is to provide a novel fishing tool of the above character, which will be durable and eiiicient in use, one that will be simple and easy to manufacture, and one which can be placed upon the market at a small cost.

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described,

claimed and illustrated in the accompany ing drawings, in which drawings,

Figure l is an elevation of the improved fishing tool,

Figure 2 is a fragmentary side elevation of the body of the tool illustrating one of the guide grooves formed therein,

Figure 3 is an inner end elevation of the body of the tool,

Figure 4t is a detail plan view showing the active face of one type of jaw used for retrieving rope,

Figure 5 is a fragmentary perspective view showing various parts of the tool prior to the interconnection thereof,

Figure 6 is a side elevation of the type of jaws employed for steering or retrieving rope,

Figure 7 is a side elevation of the type of jaws employed for retrieving well bits, tub- 6 ing and the like, one of the jaws being shown broken away and in section,

Figure 8 is an end elevation of the type of jaws employed for retrieving bits and well tubing, on

Figure 9 is a side elevation of the type of, jaws employed for grabbing bailer,

Figure 10 is an inner end elevation of the type of jaws employed for grabbing bailers.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the several views the letter A generally indicates the improved well fishing tool, which comprises a pair of elongated arms 15 and 16, the inner faces of which are provided with inwardly extending ears 17 which are connected by means of a pivot pin or bolt 18. These ears 17 are disposed intermediate the ends of the arms 15 and 16, so as to so permit the effective movement of the jaws 19 formed on the lower ends of the arms toward and away from each other. The jaws 19 are constructed according to the nature of the object which is to be retrieved from the well hole and as shown the jaws 19 are especially designed for a lug grab. As clearly shown the jaws 19 each include a plurality of angularly extending biting teeth 20 and the extreme lower ends of the jaws terminate in inclined faces 21 for permitting the guiding of the teeth 20 over the object being raised.

The extreme inner ends of the arms 15 are provided with laterally extending guide lugs 22 for a purpose, which will be hereinafter more fully described.

The inner ends of the arms are adapted to be slidably carried by the body portion 25 of the tool which has formed thereon a shank 26 suitably shaped, to permit the tool to be readily connected to a raising and lolgvering device, such as sucker rods or the li e.

The body 25 of the tool is of a cylindrical shape and the opposite sides thereof are provided with inwardly directed guide grooves 26 which gradually converge toward each other; at the inn-er end of the body. The side walls of the grooves 26 are provided with guide ways 27 in which are adapted to slidably fit the guide lugs 22 formed on the arms 15. The guide ways 27 terminate short of the outer end of the body forming stop shoulders 28 for limiting the downward movement of the arms relative to the body which prevents loss of the arms during the raising and lowering of the tool incident to the retrieving of an object in the well hole.

Notches 29 are formed in the side walls of the groove 26 at a point intermediate the ends thereof and these notches 29 communicate with the guide ways .27. he grooves 29 are of such a size as to permit the lugs 22 to be slid thereinto and into the guide ways 27.

After the arms 15 have been fitted in the grooves and the lugs 22 in the guide ways suitable wedge blocks 30 are driven into the notches 29 so as to close the same and thus prevent the accidental riding of the lugs 22 out of the guide ways 27.

In order to insure the holding of the wedge blocks in position suitable pins 31 are employed, which are driven into mating recesses 32 and 33 formed respectively in the sides of the wedge blocks 30 and one wall of the notches 29.

In assembling the tool the wedge blocks 30 are moved from the body 25 and the arms 15 are placed in the guide grooves 26 and the lugs 22 are slid into the guide ways 27 through the notches 29, after which the lugs 30 are placed in position as heretobefore described.

The tool is now ready for use.

It is evident from the inclination of the groove 26 that when the lugs 22 are at the upper ends of the guide ways 26 that the jaws 19 of the tool will be separated their greatest distance and will be permitted to conveniently glide over an object in a well hole. When the arms and lugs are disposed in the lowermost end of the body the jaws 19 will be moved toward one another to grip the object being retrieved.

In use of the improved tool the same is lowered into the well and when the lower ends of the arms strike the object which is to be raised the arms will have a tendency to ride up into the slots or grooves 26 which will separate the jaws 19 and permit the jaws to be passed over the device to be raised. Upon raising movement of the body the jaws will slide down in the grooves or slots 26 and thus bring the jaws 19 into contact with the device to be raised to permit the firm gripping of the said object, whereby the said object can be readily lifted.

It is obvious that the jaw faces 19 are to be made according to the character of the device to be raised from out of the well and in Figures 4L and 6 as shown a particular type of jaw for spearing rope. it is preferred to have the jaws for spearing rope pointed as at 35 and the inner faces of the jaws are provided with staggered biting teeth 36 for gripping the rope iibre.

In Figures 7 and S is shown the type of jaws employed for raising bits, well tubing and the like and these jaws are of a substantially semi-cylindrical shape as indicated by the reference character 37 and have the inner faces thereof provided with tapered seats for the reception of removable active jaw faces 39. These removable jaw faces 39 are provided with semi-circular biting teeth 10. The extreme lower ends of the arms of this form are flared outwardly as at ll to allow the convenient passing of the jaws over the bit or well tubing.

In Figures 9 and 10 is shown the shape of the jaws when the tool is to be used as a bailer grab and in this form the inner faces thereof are provided with inwardly directed hooks 42 which are disposed on the opposite side of the longitudinal axis of the jaws as clearly shown in Figure 10.

From the foregoing description, it can be seen that I have provided an exceptionally simple fishing tool, which will effectively accomplish the purpose intended.

Changes as to details may be made without departing from the spirit or the scope of this invention, but

lVhat I claim as new is 2-- l. A grapple comprising a pair of elongated gripping arms, means pivotally connecting the arms together at a point intermediate the ends thereof, the lower ends of the arms having means associated therewith for gripping an object, a body, a shank formed on the upper end of the body,'the opposite faces of the body being provided with converging grooves, the side walls of the grooves being provided with guide ways, said guide ways terminating short of the lower end of the body defining a stop shoulder, the side walls of the grooves being also provided with notches communicating with saidv ways, laterally extending lugs carried by the inner ends of the arms for fitting in said guide ways, the notches permitting the insertion of the lugs into said guide ways, blocks fitted in said notches and means for detachably holding the blocks in position against displacement.

2. A fishing tool comprising a pair of gripping arms pivotally connected together at a point intermediate their ends, a body having con 'erging grooves formed in the opposite faces thereof for slidably receiving the inner ends of said arms, the side walls of the grooves being provided with guideways, said guideways terminating short of the lower end of the body, fiat laterally extending guide lugs formed on the opposite side edges of the arms at the inner ends thereof for slidably fitting Within said guide Ways, the guide ways being provided with entrance notches for said lugs, and means for closing said notches, as and for the purpose specified.

In testimony whereof I aifix my signature in the presence of two Witnesses.

GEORGE A. ROBISON.

Witnesses:

ERDEL MORRIS, H. W. THOMAS. 

